egcs 971105/14 and linux 2.1.64 kernel compile

[a sun]

egcs on my 486 gives the following error whilst attempting to compile
2.1.64. 

gcc -D__KERNEL__ -I/usr/src/linux/include -Wall -Wstrict-prototypes
-O2 -fomit-frame-pointer -pipe -m486 -DCPU=486 -c -o process.o
process.c process.c: 
In function `flush_thread': 
process.c:469: fixed or forbidden register was spilled.  This may be
due to a compiler bug or to impossible asm statements or clauses.

-O works.

-a